Electrochemical communication between heterotrophically grown Rhodobacter capsulatus with electrodes mediated by an osmium redox polymer.

@article{Hasan2013ElectrochemicalCB,
  title={Electrochemical communication between heterotrophically grown Rhodobacter capsulatus with electrodes mediated by an osmium redox polymer.},
  author={K. Hasan and S. Patil and K. G{\'o}recki and D. Leech and C. H{\"a}gerh{\"a}ll and L. Gorton},
  journal={Bioelectrochemistry},
  year={2013},
  volume={93},
  pages={
          30-6
        }
}
The metabolically versatile purple bacteria Rhodobacter capsulatus was investigated to check its possible applicability in biofuel cells and electrochemical microbial biosensors. The wild type strain ATCC 17015 and mutant strain 37b4 lacking the lipopolysaccharide capsule was compared for their ability to communicate with electrodes modified with an osmium redox polymer. In this work, aerobic heterotrophically grown R. capsulatus were used to screen for efficient cell-electrode communication… Expand
Electrochemical Communication Between Electrodes and Rhodobacter capsulatus Grown in Different Metabolic Modes
The majority of efforts on microbial and photosynthetic microbial fuel cells are both curiosity driven and made to possibly meet the future growing demand for sustainable energy. The mostExpand
Modifying the endogenous electron fluxes of Rhodobacter sphaeroides 2.4.1 for improved electricity generation.
TLDR
Modifications of the endogenous electron flows mediated by quinone pool are shown to have significantly enhanced the bioelectricity generation and the study of bioenergetics in photosynthetic bacteria. Expand
Electrochemical wiring of the Gram-positive bacterium Enterococcus faecalis with osmium redox polymer modified electrodes
The Gram-positive bacterium Enterococcus faecalis was investigated to test its ability to electrochemically communicate with electrodes. E. faecalis cells were successfully “wired” to gold electrodesExpand
Wiring microbial biofilms to the electrode by osmium redox polymer for the performance enhancement of microbial fuel cells.
TLDR
Evidence from cyclic voltammetry showed that the catalytic activity of an anodic biofilm was greatly enhanced in the presence of an osmium redox polymer, indicating that electrons were more efficiently transferred to the anode via co-immobilized osmia complex tethered to wiring polymer chains at the potential range of -0.3 V-+0.1 V. Expand
Cellobiose dehydrogenase modified electrodes: advances by materials science and biochemical engineering
TLDR
Different approaches to enhance the sensitivity and selectivity of CDH-based biosensors are discussed, which focus on more efficient DET on chemically modified or nanostructured electrodes, the synthesis of custom-made redox polymers for higher MET currents and the engineering of enzymes and reaction pathways. Expand
Tuning purple bacteria salt-tolerance for photobioelectrochemical systems in saline environments.
TLDR
Rhodobacter capsulatus' capability to adapt to changing salinity, and effects on bioelectrochemical performance will be presented, as well as major drawbacks and research needs to drive future efforts and discussions. Expand
Bioelectrochemical probing of intracellular redox processes in living yeast cells—application of redox polymer wiring in a microfluidic environment
TLDR
Results are compared with previously published work when using an electrochemical batch cell, indicating that microfluidic bioelectrochemical assays employing the menadione–PVI-Os double mediator system provides an effective means to conduct automated microbial assays. Expand
Purple bacteria photo-bioelectrochemistry: enthralling challenges and opportunities.
  • Matteo Grattieri
  • Medicine, Chemistry
  • Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
  • 2020
TLDR
The process of harvesting electrons from intact purple bacteria is reviewed, and the perspective of enthralling future research possibilities is presented, placing emphasis on the major challenges in the photo-bioelectrochemistry of purple bacteria. Expand
Photo-electrochemical communication between cyanobacteria (Leptolyngbia sp.) and osmium redox polymer modified electrodes.
TLDR
This work reports on photocurrent generation from cyanobacteria immobilized on electrodes modified with an efficient electron mediator, an Os(2+/3+) redox polymer, and upon addition of ferricyanide to the electrolyte. Expand
Extracellular Electron Transfer by the Gram-Positive Bacterium Enterococcus faecalis.
TLDR
It is demonstrated that reduced demethylmenaquinone in the respiratory chain in the bacterial cytoplasmic membrane is crucial for the EET, infer that in dense microbial communities, such as in biofilm and in the large intestine, metabolism in E. faecalis and similar Gram-positive lactic acid bacteria might be electrically connected to other microbes. Expand
...
1
2
3
4
...

References

SHOWING 1-10 OF 60 REFERENCES
Electron transfer between genetically modified Hansenula polymorpha yeast cells and electrode surfaces via Os-complex modified redox polymers.
TLDR
Graphite electrodes modified with redox-polymer-entrapped yeast cells were investigated and the close contact of the Os-complex modified polymer to the cell wall appeared to be a prerequisite for electrically wiring the cytosolic FC b(2) /L-lactate redox activity and suggests the critical involvement of a plasma membrane redox system. Expand
Electron transfer from Proteus vulgaris to a covalently assembled, single walled carbon nanotube electrode functionalised with osmium bipyridine complex: application to a whole cell biosensor.
TLDR
The fabrication and use of electrodes constructed from single walled carbon nanotubes chemically assembled on a carbon surface and functionalised with an osmium(II) bipyridine complex (Osbpy) provide proof of principle that the whole cell biosensor could be used for high throughput screening of antimicrobial activity. Expand
Electrical "wiring" of viable Gluconobacter oxydans cells with a flexible osmium-redox polyelectrolyte
An application of a flexible polyvinylimidazole osmium functionalised polymer for efficient electrical wiring of whole Gluconobacter oxydans cells is described. The performance of the redox polymerExpand
Electrical wiring of live, metabolically enhanced Bacillus subtilis cells with flexible osmium-redox polymers.
TLDR
The results demonstrated that mediators did not have to pass the cytosolic membrane to bring about an efficient electronic communication between bacterial cells with a thick cell wall and electrodes. Expand
Development of a microbial biosensor based on carbon nanotube (CNT) modified electrodes
Pseudomonas putida DSM 50026 cells were used as the biological component and the measurement was based on the respiratory activity of the cells estimated from electrochemical measurements. The cellsExpand
Electroactive mixed culture derived biofilms in microbial bioelectrochemical systems: the role of pH on biofilm formation, performance and composition.
TLDR
The microbial diversity of the anode chamber community during the biofilm selection process was studied using the low cost method flow-cytometry and it was demonstrated that the pH value as well as the microbial inocula had an impact on the resulting anode community structure. Expand
A laccase-glucose oxidase biofuel cell prototype operating in a physiological buffer
Abstract Here we report on the design and study of a biofuel cell consisting of a glucose oxidase-based anode ( Aspergillus niger ) and a laccase-based cathode ( Trametes versicolor ) usingExpand
Electrical communication of cytochrome enriched Escherichia coli JM109 cells with graphite electrodes
In the present study three different strains of Escherichia coli (JM 109 - a native "wild type" strain, JM 109/pBSD 1300 - a strain overproducing the membrane anchor domain of Bacillus subtilisExpand
Anaerobic respiration in the Rhodospirillaceae: characterisation of pathways and evaluation of roles in redox balancing during photosynthesis
Recent discoveries relating to pathways of anaerobic electron transport in the Rhodospirillaceae are reviewed. The main emphasis is on the organism Rhodobacter capsulatus ∗∗ but comparisons are madeExpand
Electrical wiring of Pseudomonas putida and Pseudomonas fluorescens with osmium redox polymers.
TLDR
The performance of the redox polymers as mediators was investigated for making microbial sensors and the analytical characteristics of the microbial sensors were evaluated for determination of catechol, phenol and glucose as substrates in both batch analysis and flow analysis mode. Expand
...
1
2
3
4
5
...